Nokta, cizgi ve poligon nesneleri

geometri.py

from  math import sqrt

class Nokta:
    def __init__(self, x,y):
        self.x1 = x
        self.y1 = y

    def __str__(self):
        return f"{self.x1},{self.y1}"

class Cizgi(Nokta):
    def __init__(self, x1,y1,x2,y2):
        Nokta.__init__(self, x1,y1)
        self.x2 = x2
        self.y2 = y2

    def start(self):
        return Nokta(self.x1,self.y1)

    def stop(self):
        return Nokta(self.x2,self.y2)
        
    def uzunluk(self):
        return sqrt( abs(self.x2-self.x1)**2 + abs(self.y2-self.y1))

    def __str__(self):
        return f" ({str(self.start())} -> {str(self.stop())}) "
    
class Poligon:
    def __init__(self):
        self.start = None
        self.vertex = []

    def uzunluk(self):
        f = 0
        for vertex in self.vertex:
            f += vertex.uzunluk()
        return f

        
    def parca_ekle(self, parca):
        if type(parca) is Nokta:
            if self.start is None:
                self.start = parca
            else:
                son_vertex = self.vertex[-1]
                self.vertex.append(Cizgi(son_vertex.x2,son_vertex.y2, parca.x1, parca.y1))
        if type(parca) is Cizgi:
            if self.start is None:
                self.start = Nokta(parca.x1,parca.y1)
                self.vertex.append(parca)
            else:
                if len(self.vertex) == 0:
                    self.vertex.append(Cizgi(self.start.x1,self.start.y1,parca.x1,parca.y1))
                    self.vertex.append(parca)
                                       
    def __str__(self):
        s = "Poligon ("
        for vertex in self.vertex:
            s +=  str(vertex) + ","
        s = s[:-1] + ")"
        return s
        
                                   
        
    
if __name__ == "__main__":
    p = Poligon()
    p.parca_ekle(Nokta(0,0))
    p.parca_ekle(Cizgi(0,0,10,0 ))

    print(str(p))
    print("uzunlugu :", p.uzunluk())